JP2015055873A - Liquid crystal display device and method for manufacturing the same - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a liquid crystal display device and a method for manufacturing the liquid crystal display device, particularly, a liquid crystal display device including a retardation compensation film having improved hardness and a method for manufacturing the liquid crystal display device.SOLUTION: A liquid crystal display device includes a first substrate, a second substrate, a liquid crystal layer, and a retardation compensation film. The second substrate is arranged opposite to the first substrate. The liquid crystal layer is arranged between the first substrate and the second substrate. The retardation compensation film is formed on one surface of the first substrate and includes a fluorine resin. The inclusion of the fluorine resin in the retardation compensation film improves hardness, antifouling property, and scratch resistance, and thereby preventing damage of the retardation compensation film.

Description

The present invention relates to a liquid crystal display device and a method for manufacturing the liquid crystal display device, and more particularly to a liquid crystal display device including a retardation compensation film with improved hardness and a method for manufacturing the liquid crystal display device.

Recently, a flat panel display (FPD) that can be easily reduced in thickness and weight is widely used as a display device. In such a flat panel display, a liquid crystal display (LCD), A plasma display panel (PDP), an organic light emitting display (OLED), or the like is used.

The liquid crystal display device is one of the most widely used flat panel display devices at present. A voltage is applied to a specific molecular arrangement of the liquid crystal, the molecular arrangement is changed, and light is emitted by the conversion of the molecular arrangement. This is a display device that displays an image by converting changes in optical properties such as birefringence, optical rotation, dichroism, and light scattering characteristics of a liquid crystal cell with visual changes.

A liquid crystal display, which is one of the display devices, uses a liquid crystal to display an image. The liquid crystal display device is advantageous in that it is thinner and lighter in weight, consumes less power, and has a lower driving voltage than other display devices.

The liquid crystal display device is generally disposed at a lower part of the liquid crystal display panel using the light transmittance of the liquid crystal to display an image, and provides light through the liquid crystal display panel. Back-light assembly. At this time, the backlight assembly generally generates non-polarized light.

Therefore, the liquid crystal display device further includes a polarizing plate disposed on the upper and lower portions of the liquid crystal display panel to polarize light because it is difficult to realize an image using the non-polarized light. However, the polarizing plate has a relatively large thickness, and occupies a considerable portion of the manufacturing cost of the liquid crystal display device, which increases the thickness and manufacturing cost of the liquid crystal display device.

Japanese Patent Publication No. 2012-173609 Korean Published Patent No. 2012-007969 Japanese Patent Publication No. 2012-155308

On the other hand, the technical problem of the present invention is focused on such points, and an object of the present invention is to provide a liquid crystal display device including a retardation compensation film with improved hardness. Another object of the present invention is to provide a method for manufacturing the liquid crystal display device.

A liquid crystal display device according to an embodiment for realizing the object of the present invention includes a first substrate, a second substrate, a liquid crystal layer, and a retardation compensation film.
The second substrate faces the first substrate. The liquid crystal layer is disposed between the first substrate and the second substrate. The retardation compensation film is formed on one surface of the first substrate and includes a fluorin resin.

In an embodiment of the present invention, the fluorin element ratio in the surface portion of the retardation compensation film may be 20 atomic% to 30 atomic% with respect to the total element ratio.

In one embodiment of the present invention, the fluorin resin may be polytetrafluoroethylene (PTFE), fluorinated ethylene propylene (FEP), perfluoroalkoxy (PFA), ethylene tetrafluoroethylene (PFA), or polytetrafluoroethylene (PTFE). Ethylene-Tetrafluoroethylene (ETFE), polyvinylidene fluoride (PVDF), ethylene-chlorotrifluoroethylene (ECTFE), polychlorotrifluoroethylene (ECTFE), polychlorotrifluoroethylene (ECTFE), polychlorotrifluoroethylene (ECTFE), polychlorotrifluoroethylene (ECTFE) ylene; PCTFE) and can be selected one or more from a group consisted these unions.

In one embodiment of the present invention, the retardation compensation film may be disposed under the first substrate.

In one embodiment of the present invention, the retardation compensation film may be disposed on the second substrate.

In one embodiment of the present invention, the retardation compensation film may be disposed on a lower portion of the first substrate and an upper portion of the second substrate.

The phase difference compensation film may be disposed between the second substrate and the black matrix. The black matrix may be further disposed on the second substrate.

The phase difference compensation film may be disposed on the second substrate and the black matrix. The black matrix may further include a black matrix disposed on the second substrate.

In example embodiments, the liquid crystal display device may further include an overcoating layer disposed on the second substrate, and the retardation compensation film may be disposed on the overcoating layer.

The phase difference compensation film may be disposed on the common electrode, further including a common electrode disposed on the second substrate.

In an embodiment of the present invention, the retardation compensation film may further include a reactive mesogen having a fluorin functional group.

In one embodiment of the present invention, the retardation compensation film may have a thickness of 10 μm or less.

In one embodiment of the present invention, the retardation compensation film may have a hardness of 2H or more.

In an embodiment of the present invention, the surface energy of the retardation compensation film may be 25 mN / m or less.

A method of manufacturing a liquid crystal display according to another embodiment for realizing the above-described object of the present invention is to apply a retarder composition containing a fluorin resin on a substrate, and to form a retarder coating layer. ), Heating the retarder coating layer, exposing the retarder coating layer to ultraviolet UV so that the retarder coating layer has optical anisotropy, and heat-treating the retarder coating layer. Forming a phase difference compensation film.

In one embodiment of the present invention, the substrate may include a first substrate and a second substrate facing the first substrate.

In one embodiment of the present invention, the retarder composition comprises 10% to 30% by weight of a fluorin resin, 20% to 40% by weight of a reactive mesogen, 1% to 10% by weight of a photocurable monomer, and a thermosetting agent. It may be 1 to 10% by weight and 10 to 30% by weight of solvent.

In an embodiment of the present invention, the retarder composition may be applied to a lower portion of the first substrate.

In an embodiment of the present invention, the retarder composition may be applied on the second substrate.

In an embodiment of the present invention, the retarder composition may be applied to a lower portion of the first substrate and an upper portion of the second substrate.

According to the embodiment of the present invention, the retardation compensation film contains a fluorin resin, and the hardness, antifouling property and scratch resistance are improved, and damage to the retardation compensation film can be prevented.

1 is a plan view of a liquid crystal display device according to an exemplary embodiment of the present invention. It is a top view of the 1st pixel of FIG. FIG. 2 is a cross-sectional view of a liquid crystal display device according to an exemplary embodiment of the present invention taken along line I-I ′ of FIG. 1 is a cross-sectional view of a liquid crystal display device according to an exemplary embodiment of the present invention. 1 is a cross-sectional view of a liquid crystal display device according to an exemplary embodiment of the present invention. 1 is a cross-sectional view of a liquid crystal display device according to an exemplary embodiment of the present invention. 1 is a cross-sectional view of a liquid crystal display device according to an exemplary embodiment of the present invention. 1 is a cross-sectional view of a liquid crystal display device according to an exemplary embodiment of the present invention. 1 is a cross-sectional view of a liquid crystal display device according to an exemplary embodiment of the present invention.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the drawings.

In the present specification, specific structural or functional descriptions are given merely for the purpose of illustrating embodiments of the present invention, and the embodiments of the present invention may be implemented in various forms and described herein. The present invention should not be construed as being limited to the described embodiments but should be construed as including all modifications, equivalents and alternatives falling within the spirit and scope of the invention.

When one component is listed as “contacted” or “contacted” with a different component, it may be in direct contact with, or in contact with, another component, It will be understood that other components may be present. On the other hand, when a component is described as “directly contacted” or “directly contacted” with a different component, it can be understood that there are no other components in between. Other expressions describing the relationship between the components, such as “between” and “directly between” or “adjacent to” and “adjacent to” are to be interpreted similarly. Can do.

The terminology used herein is for the purpose of describing example embodiments only and is not intended to be limiting of the invention. The singular form includes the plural form unless the context clearly indicates otherwise. In this specification, terms such as “including” or “having” are intended to indicate the presence of implemented features, numbers, steps, actions, components, parts, or combinations thereof. Must be understood as not excluding in advance the existence or additional possibilities of one or more other features or numbers, steps, actions, components, parts or combinations thereof. . Unless defined differently, all terms used herein, including technical and scientific terms, are generally understood by those with ordinary skill in the art to which this invention belongs. It has the same meaning. Terms as commonly used and pre-defined should be construed to have a meaning consistent with the meaning possessed by the context of the related art and, unless explicitly defined in this application, are ideally or overly formal. It is not interpreted as a typical meaning.

Terms such as first, second, and third can be used to describe various components, but these components are not limited by the terms. The terms are used to distinguish one component from other components. For example, the first component is named as the second component or the third component without departing from the scope of the present invention, and the second component or the third component is also alternately named. can do.

FIG. 1 is a plan view of a liquid crystal display device according to an exemplary embodiment of the present invention. FIG. 2 is a plan view of the first pixel of FIG. FIG. 3 is a cross-sectional view of a liquid crystal display device according to an exemplary embodiment of the present invention taken along line I-I ′ of FIG. 1.

Referring to FIG. 1, the liquid crystal display device includes a plurality of gate lines GL, a plurality of data lines DL, and a plurality of pixels.

The gate line GL may extend in the first direction D1. The data line DL may extend in a second direction D2 that intersects the first direction D1. In contrast, the gate line GL may extend in the second direction D2, and the data line DL may extend in the first direction D1.

The pixels are arranged in a matrix form. The pixel may be disposed in a region defined by the gate line GL and the data line DL.

Each pixel can be connected to an adjacent gate line GL and an adjacent data line DL.

The pixel may have a rectangular shape extending in the second direction D2. The pixel region may have various shapes such as a rectangular shape, a V shape, and a Z shape extending in one direction when viewed from a plane. In the case of the V shape, for example, the pixel region is bent along the first direction at the center portion in the second direction. In the case of the Z shape, for example, the pixel region is bent in a zigzag shape.

Referring to FIGS. 2 and 3, the liquid crystal display according to an exemplary embodiment of the present invention includes a first substrate 100, a second substrate 200, a liquid crystal layer 300, a retardation compensation film 400A, and a first polarizing plate. 500 and the second polarizing plate 600.

The first substrate 100 is a transparent insulating substrate. For example, a glass substrate or a transparent plastic substrate may be used. The first substrate 100 has a plurality of pixel regions for displaying an image. The pixel regions are arranged in a matrix having a plurality of columns and a plurality of rows.

The pixel further includes a switching element. For example, the switching element may be a thin film transistor (TFT). The switching element may be connected to an adjacent gate line GL and an adjacent data line DL. The switching element may be disposed in a region where the gate line GL and the data line DL intersect.

A gate pattern including a gate electrode GE and a gate line GL is disposed on the first substrate 100. The gate line GL is electrically connected to the gate electrode GE.

A gate pattern (not shown) including a gate electrode GE and a gate line GL is disposed on the first substrate 100. The gate line GL is electrically connected to the gate electrode GE.

The gate insulating layer 110 is disposed on the first substrate 100 on which the gate pattern is disposed, and insulates the gate pattern.

A semiconductor pattern SM is formed on the gate insulating layer 110. The semiconductor pattern SM is overlapped with the gate electrode GE.

A data pattern including a data line DL, a source electrode SE, and a drain electrode DE is disposed on the gate insulating layer 110 on which the semiconductor pattern SM is formed. The source electrode SE overlaps the semiconductor pattern SM and is electrically connected to the data line DL.

The drain electrode DE is separated from the source electrode SE on the semiconductor pattern SM. The semiconductor pattern SM achieves a conductive channel between the source electrode SE and the drain electrode DE.

The gate electrode GE, the source electrode SE, the drain electrode DE, and the semiconductor pattern SM constitute the thin film transistor TFT.

The data line DL is disposed on the gate insulating layer 110. The gate insulating layer 110 may be disposed on the entire area of the first substrate 100.

The gate insulating layer 110 may include an organic or inorganic insulating material. For example, the gate insulating layer 110 may include a benzocyclobutene resin, an olefin resin, a polyimide resin, an acrylic resin, a polyvinyl resin, a siloxane resin, and a silicon. ) Based resin and the like.

The data insulating layer 120 is disposed on the gate insulating layer 110 where the data pattern is disposed, and insulates the data pattern.

The data insulating layer 120 is disposed on the gate line GL, the data line DL, and the switching element. The data insulating layer 120 may be disposed on the entire area of the first substrate 100. The data insulating layer 120 may include an organic or inorganic insulating material. For example, the data insulating layer 120 may include a benzocyclobutene resin, an olefin resin, a polyimide resin, an acrylic resin, a polyvinyl resin, a siloxane resin, silicon. ) Based resin and the like.

The color filter layer CF may be disposed on the data insulating layer 120.

The color filter layer CF provides color to the light transmitted through the liquid crystal layer 300. The color filter layer CF may be a red color filter (red), a green color filter (green), and a blue color filter (blue).

Each color filter is provided corresponding to each pixel region. The pixels adjacent to each other may have different colors.

In the present embodiment, the color filters may be overlapped by color filters that are partially adjacent to each other at the boundary between adjacent pixel regions. In contrast, the color filters may be formed apart from each other at the boundary between pixel regions adjacent to each other in the first direction D1. That is, the color filter may be formed in an island shape with a gate line as a boundary in the first direction D1.

A first overcoating layer 130 may be included on the color filter layer CF.

The first overcoating layer 130 may be formed on the color filter layer CF to planarize the surface of the first substrate 100.

The first overcoating layer 130 may include an organic or inorganic insulating material. For example, the first overcoating layer 130 may be a benzocyclobutene resin, an olefin resin, a polyimide resin, an acrylic resin, a polyvinyl resin, a siloxane resin, silicon. (silicon) resin can be included.

A pixel electrode (PE) may be formed on the first overcoating layer 130.

The pixel electrode PE is in electrical communication with the thin film transistor through a contact hole CH. The pixel electrode PE may be disposed in the pixel region. A gradation voltage is applied to the pixel electrode PE through the thin film transistor TFT. For example, the pixel electrode PE may include a transparent conductor such as indium tin oxide ITO, indium zinc oxide IZO, and aluminum zinc oxide AZO. For example, the pixel electrode PE may include a slit pattern.

The second substrate 200 is a glass substrate or a transparent insulating substrate. For example, a glass substrate or a transparent plastic substrate may be used. The second substrate 200 may include a signal line connected to the thin film transistor and a black matrix BM that overlaps the signal line and blocks light.

The black matrix BM may be disposed corresponding to a region where the gate line GL, the data line DL, and the switching element are disposed on the first substrate 100. The black matrix BM may include chromium Cr or chromium oxide.

The black matrix BM blocks light by overlapping with a plurality of gate lines extending in the first direction. The black matrix BM is formed in a non-display area of pixels.

A second overcoating layer 210 may be formed on the second substrate 200 on which the black matrix BM is formed.

The second overcoating layer 210 may be formed on the second substrate 200 on which the black matrix BM is formed, and the surface of the second substrate 200 may be planarized.

The second overcoating layer 210 may include an organic or inorganic insulating material. For example, the second overcoating layer 210 includes a benzocyclobutene resin, an olefin resin, a polyimide resin, an acrylic resin, a polyvinyl resin, a siloxane resin, silicon (silicon) resin can be included.

A common electrode CE may be formed on the second overcoating layer 210.

A gray scale voltage is applied to the pixel electrode PE and the common electrode CE to form an electric field. For example, the common electrode CE may include a transparent conductor such as indium tin oxide ITO, indium zinc oxide IZO, and aluminum zinc oxide AZO. For example, the common electrode CE may include a slit pattern.

The liquid crystal layer 300 is disposed between the first substrate 100 and the second substrate 200.

The liquid crystal layer 300 may include liquid crystal molecules. The liquid crystal layer adjusts the light transmittance of the pixel by adjusting the arrangement of liquid crystal molecules by an electric field applied between the first electrode and the second electrode.

In the present embodiment, the liquid crystal display device has a COA (color filter on array) structure in which the color filter layer CF is formed below the liquid crystal layer 300 and the black matrix BM is formed above the liquid crystal layer 300. However, it is not limited to that. In contrast, the liquid crystal display device may have a COA (color filter on array) structure in which the black matrix BM is formed on the liquid crystal layer 300. For example, the color filter layer CF and the black matrix BM may be disposed on the liquid crystal layer 300.

Although not shown, the liquid crystal display device may include an alignment film (not shown) for aligning the liquid crystal molecules of the liquid crystal layer 300.

The alignment layer (not shown) may be disposed between the liquid crystal layer 300 and the first overcoating layer 130 and between the liquid crystal layer 300 and the second overcoating layer 210.

The alignment layer is for pre-tilting the liquid crystal molecules of the liquid crystal layer 300. The alignment film is formed using an alignment liquid. After the alignment liquid is applied on the first substrate 100 and the second substrate 200, the alignment liquid is removed. The alignment liquid can be applied by various methods such as slit coating and spin coating. In order to remove the alignment liquid, it can be placed at room temperature or heated. The alignment liquid is obtained by mixing an alignment material such as polyimide (PI) in an appropriate solvent.

In contrast, the alignment layer may be omitted depending on the type of the liquid crystal layer 300 or the structure of the pixel electrode PE and the common electrode CE. For example, when the pixel electrode PE has a micro slit and the liquid crystal can be initially aligned without an additional alignment film, the alignment film can be omitted. Alternatively, the alignment layer may be omitted when an initial alignment positive reactive mesogen layer of the liquid crystal layer 300 is formed.

The liquid crystal display device according to an exemplary embodiment of the present invention includes a retardation compensation film 400 </ b> A disposed under the first substrate 100.

The retardation compensation film 400A may include a fluorin resin.
A retarder composition including a fluorin resin is coated on the lower portion of the first substrate 100 to form a retarder coating layer.
The retarder composition includes a fluorin resin, a reactive mesogen, a photocurable monomer, a thermosetting agent, and a solvent.

The retarder composition comprises 10% to 30% by weight of a fluorin resin, 20% to 40% by weight of a reactive mesogen, 1% to 10% by weight of a photocurable monomer, 1% to 10% by weight of a thermosetting agent, and The solvent may be 10 wt% to 30 wt%.

[Fluorine resin]
The retardation compensation film 400A may include the fluorin resin in order to improve hardness and improve antifouling properties and scratch resistance.

As the fluorin resin, a compound in which the hydrogen position is substituted with fluorin can be used.

For example, the fluorin resin may be polytetrafluoroethylene (PTFE), fluorinated ethylene propylene (FEP), perfluoroalkoxy (PFA), ethylene tetrafluoroethylene (ETF), or the like. ), Poly vinylidene fluoride (PVDF), ethylene-chlorotrifluoroethylene (ECTFE), polychlorotrifluoroethylene (PCT) E) and is selected one or more groups that have changed from these unions, but not limited to.

The fluorin element ratio of the surface portion of the retardation compensation film 400A formed by applying the retarder composition containing the fluorin resin to the lower portion of the first substrate 100 is 20 element% to 30 element% with respect to the total element ratio. It may be a range.

When the fluorin element ratio is less than 20 element%, it is difficult to obtain a sufficient hardness for protecting the retardation compensation film 400A from scratches and the like. When the fluorin element ratio exceeds 30%, there is a problem that phase delay hardly occurs.

The content of the fluorin resin may be 10% by weight to 30% by weight. When the content of the fluorin resin is less than 10% by weight with respect to the entire composition, the hardness is 2H or less, the hardness and antifouling property of the retardation compensation film 400A are reduced, and the amount exceeds 30% by weight. In this case, the phase delay characteristic may be deteriorated.

[Reactive mesogens]
The reactive mesogen has a specific phase. The reactive mesogen is a photocurable reactive mesogen. The reactive mesogen includes an aliphatic ring, an aromatic ring, and the like, and may have a plurality of functional groups at the terminal.

When the reactive mesogen is exposed to light such as ultraviolet rays, the plurality of reactive mesogens react with an initiator or the like to form an oligomer, a polymer, or a mixture thereof. be able to.

Accordingly, one or more of the functional groups may include a photoreactive group. For example, the photoreactive group may have an acrylate, methacrylate, epoxy, oxetane, vinyl-ether, styrene, thiolene reaction period, etc. .

The content of the reactive mesogen may be 20% by weight to 40% by weight. When the content of the reactive mesogen is less than 20% by weight with respect to the entire composition, the phase retardation characteristic is lowered, and when it is more than 40% by weight, the flexibility of the retardation compensation film 400A may be lowered. .

[Photocurable monomer]
The photocurable monomer may be an acrylate monomer. The acrylate monomer reacts with the reactive mesogen by UV exposure to cure the retarder coating layer.

For example, the acrylate monomer may be dipentaerythritol hexaacrylate, dicyclopentadiene acrylate, dicyclopentadiene methacrylate, trimethylol acrylate, or trimethylol acrylate. ), Diethylene glycol dimethacrylate (ethylene glycol acrylate), ethylene glycol acrylate (ethylene glycol acrylate) Such as ethylene glycol dimethacrylate (ethylene glycol dimethacrylate) are used, it may be respectively used alone or in combination.

The content of the photocurable monomer may be 1% by weight to 10% by weight. When the content of the photocurable monomer is less than 1% by weight with respect to the entire composition, the photocuring is not sufficiently progressed, and the stability of the coating film is reduced. When the content exceeds 10% by weight, the coating film Flexibility may be reduced.

[Thermosetting agent]
The thermosetting agent reacts with the reactive mesogen by heat to cure the retarder coating layer.

For example, the thermosetting agent includes an amine-based curing agent, an acid anhydride-based curing agent, an imidazole-based curing agent, and the like, and can be appropriately selected and used depending on the process temperature.

Specifically, the thermosetting agent includes diaminodiphenylmethane (DDM, diaminodiphenylmethane), diaminodiphenylsulfone (DDS, diaminodiphenylsulfone), tetrahydrophthalic anhydride (THPA), hexahydrophthalic anhydride (HPA), ), Methyltetrahydrophthalic anhydride (MeTHPA, methylhydrophthalic anhydride), nadic methyl anhydride (NMA), hydrolyzed methylnaphthyl anhydride (HNMA, hydrolyzed methylhydridic) Phthalic anhydride (PA), 2-phenyl-4-methyl-hydroxymethylimidazole, 3- (3,4-dichlorophenyl) -1,1-dimethylurea (DCMU, 3- (3,4-dichlorophenyl) -1, 1-dimethylurea), sulfonium salt, phosphonium salt, biphenyl ether block carboxylic acid, active ester of polyvalent carboxylic acid, 1-cyanoethyl 2-phenylimidazole (TCI, 1-cyanoethyl 2-phenyl imidazole), 1,1-dimethoxy-N, N-dimethylmethanamine (1,1-dimethyl-N, N-dimethyl methanoli) ne), 1-phenylethylamine (2-phenylethylamine), 2- (diethoxylamino) ethylamine (2- (diethylylamino) ethylamine), 2-phenylethylamine (2-phenylethylamine), 3-methoxypropylamine (3-methoxypropylamine) , Butylamine, cyclohexylamine, 1-phenylpropylamine, di (2-ethylhexyl) amine, dibutylamine, diethylamine, diethylamine Diethylenetriamine, dimethyl Dimethylethylamine, dipropylamine, dipropylenetriamine, isopropylamine, N, N-bis (3-aminepropyl) methylamine (N, N-bis- (3- aminepropylyl) methylamine), N, N-dimethylisopropylamine (N, N-dimethylisopropylamine), N-ethyldiisopropylamine, N-octylamine, N3-amine 3- (2-amino) Ethylamino) propylamine (N3-amine3- (2-aminoethylamino) propylam ne), propylamine, tributylamine, tripropylamine, tris- (2-ethylhexyl) amine (Tris- (2-ethylhexyl) amine), tert-butylamine, Diisopropanolamine, methyldiethanolamine, N, N-dimethylisopropanolamine (N, N-dimethylisopropanolamine), N-methylethanolamine, 2,6-xylidine (2,6-xylidine) ), N-ethyl-N- (2-hydroxyethyl) anily N-ethyl-N- (2-hydroxyethyl) aniline, ethylenediamine, isophoronediamine, ethylethanolamine, N- (2-aminoethyl) ethanolamine (N- (2) -Aminoethyl) ethanolamine), triisopropanolamine, diethylenetriamine, ethylenediamine, N- (2-amineethyl) ethanolamine (N- (2-amineethyl) 1- (1-aminomethoxylamine), methylimidazole), 1- Vinylimidazole (1-vinylimidozole), N, N-dimethylisopropanolamine (N, N-dimethylisopropanamine), N-ethyl-N- (2-hydroxyethyl) aniline (N-ethyl-N- (2-hydroxyethyl) aniline) Examples thereof include 1-methylimidazole, N, N-dimethylcyclohexylamine (N, N-dimethylcyclohexylamine), trimethylaminoethylethanolamine, and the like. These can be used alone or in combination.

The content of the thermosetting agent may be 1% by weight to 10% by weight. When the content of the thermosetting agent is less than 1% by weight with respect to the entire composition, when the thermosetting does not proceed sufficiently, the stability of the coating film decreases and exceeds 10% by weight. Flexibility may be reduced.

[solvent]
The solvent may be a ketone, hydrocarbon or alcohol solvent. Examples of the ketone solvent include, but are not limited to, acetone, methyl ethyl ketone, cyclopentanone, cyclohexanone, and cycloheptanone. Examples of the hydrocarbon solvent include hexane, benzene, toluene, xylene, anisole and the like, but are not limited thereto. For example, the alcohol solvent may be methanol, ethanol, isopropanol, n-butanol, isobutanol or the like, but is not limited thereto.

The content of the solvent may be 10% by weight to 30% by weight. When the content of the solvent is less than 10% by weight based on the entire composition, the viscosity of the retarder composition may increase excessively, and the uniformity of the retardation compensation film 400A may be reduced. When the weight percentage is exceeded, it is difficult to obtain the desired thickness of the retardation compensation film 400A.

The retarder composition may further include a photopolymerization initiator. The photopolymerization initiator is decomposed by light to generate radicals, thereby activating photopolymerization of the photocurable monomer.

For example, in the photopolymerization initiator, a benzoin compound, an acetophenone compound, a diethoxyacetophenone compound, a hydroxyacetophenone compound, a benzophenone compound, a thioxanthone compound, an anthraquinone compound, an α-acyloxime ester compound, phenylglyoxyl Acid compounds, benzyl compounds, azo compounds, diphenyl sulfide compounds, acylphosphine oxyl compounds, organic dye compounds, iron-phthalocyanine compounds, and the like can be used. Each of these can be used alone or in combination.

Specifically, the photopolymerization initiator includes 1-phenyl-2-hydroxy-2-methyl propan-1-one, 1-hydroxycyclohexyl. 1-hydroxy cyclohexyl phenyl ketone, amino acetophenone, benzyl dimethyl ketal, benzoin ether, thioxanthone (thioxanthone) ETAQ), camphorquinone, alpha-naphthol, 2, 4 -Diethylthioxanthone (2,4-diethylthioxanthone), trimethylbenzoyl diphenylphosphine oxide, benzophenone, benzophenone, 2,2-diethoxyacetophenyl (2,2-diethylacetophenoyl) benzoyl ether Can be used.

The content of the photopolymerization initiator may be 1% by weight to 10% by weight. When the content of the photopolymerization initiator is less than 1% by weight based on the entire composition, curing does not proceed sufficiently, and when it exceeds 10% by weight, the flexibility of the coating film may be lowered.

The fluorin resin is included in the retarder composition and is applied to the first substrate 100. There is a difference in surface energy between the fluorin resin and the reactive mesogen. Therefore, phase separation of the fluorin resin and the reactive mesogen can occur in the process of UV exposure, drying and heat treatment.

Generally, the surface energy of the reactive mesogen is 30 to 45 mN / m and has a large surface energy. On the other hand, the surface energy of the retardation compensation film 400A may be 25 mN / m or less. For example, the surface energy of the retardation compensation film 400A may be 10 to 25 mN / m.

The hardness of the retardation compensation film 400A may be 2H or more. For example, the hardness of the retardation compensation film 400A may be 2H to 5H.

In the method of applying the retarder composition, a method such as slit, ink jet, roll resin, or spin coating can be used. The retarder composition is in a solution state, and the viscosity may be in the range of 1 mPas to 50 mPas.

The retarder coating layer is heated. The first substrate 100 coated with the retarder coating layer can be dried using a heating device. For example, the heating device may be a hot plate. At this time, the heating device can set the retarder coating layer to a surface temperature in the range of 70 ° C. to 110 ° C. The first substrate 100 coated with the retarder coating layer is heated to cause a curing reaction such as a thermosetting agent and a reactive mesogen, thereby removing the solvent contained in the retarder coating layer. it can.

The retarder coating layer is exposed to ultraviolet UV. The retarder coating layer is exposed to ultraviolet UV, causes a curing reaction of a photocurable monomer and a reactive mesogen, and has optical anisotropy. In the present embodiment, the case where the retarder coating layer is formed of one layer has been described as an example, but the present invention is not limited thereto.

In contrast, the retarder coating layer can be formed in a multi-layer structure. When forming the retarder coating layer which consists of several layers, each retarder coating layer can be exposed to ultraviolet-ray UV of a different wavelength, respectively.

The retarder coating layer is heat treated. The first substrate 100 having the retarder coating layer exposed to ultraviolet rays can be heat-treated using a deposition apparatus. For example, the generating apparatus may be an oven. At this time, the internal temperature of the generating apparatus can be set to a temperature ranging from 110 ° C to 130 ° C. Through the heat treatment, the retardation coating layer may have retardation in a direction perpendicular to a direction in which ultraviolet rays are irradiated. Further, through the heat treatment, the retarder coating layer is completely cured and the optical anisotropy is amplified.

Through the heat treatment, the retardation compensation film 400A that is disposed under the first substrate 100 and includes a fluorin resin may be formed.

The thickness of the retardation compensation film 400A may be 10 μm or less. The thickness of the retardation compensation film 400A may be 5 um or less.

The retardation compensation film 400A may further include a reactive mesogen having a fluorin functional group.

The reactive mesogen may include fluorin in one or more of the functional groups. The reactive mesogen containing the fluorin may undergo phase separation of the retarder composition in the process of being exposed to ultraviolet light, dried and heat-treated in the same manner as the fluorin resin.

Through such phase separation, the reactive mesogen containing a fluorine functional group has a lower surface energy than the reactive mesogen, and can move to the outline of the retardation compensation film 400A. That is, the retarder composition is disposed adjacent to the lower portion of the first substrate 100, and the reactive mesogen including the fluorin resin and the fluorin functional group is disposed under the retarder composition. Can do. Therefore, the hardness, antifouling property and scratch resistance of the retardation compensation film 400A can be improved.

The liquid crystal display device may further include a first polarizing plate 500 disposed under the first substrate 100 and a second polarizing plate 600 disposed on the second substrate 200.

For example, the first polarizing plate 500 may be attached to the lower surface of the first substrate 100. The first polarizer 500 can polarize light provided from a backlight assembly (not shown). The first polarizing plate 500 may have a first polarization axis. The first polarizing plate 500 may allow light in the first polarization axis direction to pass among light provided from the backlight assembly.

For example, the second polarizing plate 600 may be attached to the surface of the second substrate 500. The second polarizing plate 600 can polarize light that has passed through the color filter layer CF. The second polarizing plate 600 may have a second polarization axis. The second polarization axis may be perpendicular to the first polarization axis. The second polarizing plate 600 can pass light in the second polarization axis direction among the light that has passed through the color filter layer CF.

In the liquid crystal display device according to this embodiment, the first polarizing plate 500 is disposed below the first substrate 100, and the second polarizing plate 600 is disposed above the second substrate 200. Although described in (on-cell type), it is not limited thereto. In contrast, the first polarizing plate and the second polarizing plate may be formed in an in-cell type disposed between the first substrate and the second substrate of the liquid crystal display device.

FIG. 4 is a cross-sectional view of a liquid crystal display device according to an exemplary embodiment of the present invention.

Referring to FIG. 4, the liquid crystal display according to an exemplary embodiment of the present invention includes a first substrate 100, a second substrate 200, a liquid crystal layer 300, a retardation compensation film 400B, a first polarizing plate 500, and a second polarizing plate. A polarizing plate 600 is included.

The liquid crystal display device according to FIG. 4 is substantially the same as the liquid crystal display device according to FIG. 3 except for the configuration of the retardation compensation film 400B, and therefore, redundant description is omitted or simplified.

The liquid crystal display device according to an exemplary embodiment of the present invention includes a retardation compensation film 400 </ b> B disposed on the second substrate 200.

The retardation compensation film 400B may include a fluorin resin.

A retarder composition including a fluorin resin is coated on the second substrate 200 to form a retarder coating layer.

The retarder composition includes a fluorin resin, a reactive mesogen, a photocurable monomer, a thermosetting agent, and a solvent.

The retardation compensation film 400B may include the fluorin resin in order to improve hardness and improve antifouling properties and scratch resistance.

The fluorin resin is included in the retarder composition and applied to the second substrate 200. There is a difference in surface energy between the fluorin resin and the reactive mesogen. Accordingly, phase separation between the fluorin resin and the reactive mesogen may occur in the process of UV exposure, drying, and heat treatment.

Generally, the surface energy of the reactive mesogen is 30 to 45 mN / m and has a large surface energy. On the other hand, the surface energy of the retardation compensation film 400B may be 25 mN / m or less. For example, the surface energy of the retardation compensation film 400B may be 10 to 25 mN / m.

The hardness of the retardation compensation film 400B may be 2H or more. For example, the hardness of the retardation compensation film 400B may be 2H to 5H.

In the method of applying the retarder composition, a method such as slit, ink jet, roll resin, or spin coating can be used. The retarder composition is in a solution state, and the viscosity may be in the range of 1 mPas to 50 mPas.

The retarder coating layer is heated. The second substrate 200 on which the retarder coating layer is applied can be dried using a heating device. For example, the heating device may be a hot plate. At this time, in the heating device, the retarder coating layer can be set to a surface temperature in the range of 70 ° C. to 110 ° C. The second substrate 200 on which the retarder coating layer is applied is heated to cause a curing reaction such as a thermosetting agent and a reactive mesogen, thereby removing the solvent contained in the retarder coating layer. it can.

The retarder coating layer is exposed to ultraviolet UV. The retarder coating layer is exposed to ultraviolet UV, causes a curing reaction of a photocurable monomer and a reactive mesogen, and has optical anisotropy.

In the present embodiment, the case where the retarder coating layer is formed of one layer has been described as an example, but the present invention is not limited thereto.

In contrast, the retarder coating layer can be formed in a multi-layer structure. When forming the retarder coating layer which consists of several layers, each retarder coating layer can be exposed to ultraviolet-ray UV of a different wavelength, respectively.

The retarder coating layer is heat treated. The second substrate 200 having the retarder coating layer exposed to ultraviolet rays can be heat-treated using a deposition apparatus. For example, the generating apparatus may be an oven. At this time, the internal temperature of the generating apparatus can be set to a temperature ranging from 110 ° C to 130 ° C. Through the heat treatment, the retarder coating layer may have retardation in a direction perpendicular to a direction in which ultraviolet rays are irradiated. Further, through the heat treatment, the retarder coating layer is completely cured and the optical anisotropy is amplified.

Through the heat treatment, the retardation compensation film 400B disposed on the second substrate 200 and including a fluorin resin may be formed.

The thickness of the retardation compensation film 400B may be 10 μm or less. The thickness of the retardation compensation film 400B may be 5 um or less.

The retardation compensation film 400B may further include a reactive mesogen having a fluorin functional group.

The reactive mesogen may include fluorin in one or more of the functional groups. The reactive mesogen containing the fluorin may undergo phase separation from the reactive mesogen in the process of being exposed to ultraviolet light, dried and heat-treated in the same manner as the fluorin resin.

Through such phase separation, the reactive mesogen containing a fluorin functional group has a lower surface energy than the reactive mesogen, and can move to the outline of the retardation compensation film 400B. That is, the reactive mesogen is disposed adjacent to the top of the second substrate 200, and the reactive mesogen including the fluorin resin and the fluorin functional group is disposed on the reactive mesogen. Can do. Therefore, the hardness, antifouling property and scratch resistance of the retardation compensation film 400B can be improved.

FIG. 5 is a cross-sectional view of a liquid crystal display device according to an exemplary embodiment of the present invention.

Referring to FIG. 5, the liquid crystal display according to an exemplary embodiment of the present invention includes a first substrate 100, a second substrate 200, a liquid crystal layer 300, retardation compensation films 400A and 400B, a first polarizing plate 500. And the second polarizing plate 600.

The liquid crystal display device according to FIG. 5 is substantially the same as the liquid crystal display device according to FIG. 3 except for the configuration of the phase difference compensation films 400A and 400B.

A liquid crystal display according to an exemplary embodiment of the present invention includes a retardation compensation film 400A disposed on a lower portion of the first substrate 100 and a retardation compensation film 400B disposed on an upper portion of the second substrate 200. .

The retardation compensation films 400A and 400B may include a fluorin resin.

A retarder composition including a fluorin resin is coated on the lower portion of the first substrate 100 and the upper portion of the second substrate 200 to form a retarder coating layer.

The retarder composition includes a fluorin resin, a reactive mesogen, a photocurable monomer, a thermosetting agent, and a solvent.

The retardation compensation films 400A and 400B may include the fluorin resin in order to improve hardness and improve antifouling properties and scratch resistance.

The fluorin resin is included in the retarder composition and is applied to the first substrate 100 and the second substrate 200. There is a difference in surface energy between the fluorin resin and the reactive mesogen. Accordingly, phase separation between the fluorin resin and the reactive mesogen may occur in the process of UV exposure, drying, and heat treatment.

Generally, the surface energy of the reactive mesogen is 30 to 45 mN / m and has a large surface energy. On the other hand, the surface energy of the retardation compensation films 400A and 400B may be 25 mN / m or less. For example, the surface energy of the retardation compensation films 400A and 400B may be 10 to 25 mN / m.

The retardation compensation films 400A and 400B may have a hardness of 2H or more. For example, the hardness of the retardation compensation films 400A and 400B may be 2H to 5H.

In the method of applying the retarder composition, a method such as slit, ink jet, roll resin, or spin coating can be used. The retarder composition is in a solution state, and the viscosity may be in the range of 1 mPas to 50 mPas.

The retarder coating layer is heated. The first substrate 100 and the second substrate 200 on which the retarder coating layer is applied can be dried using a heating device. For example, the heating device may be a hot plate. At this time, the heating device can set the retarder coating layer to a surface temperature in the range of 70 ° C. to 110 ° C. By heating the first substrate 100 and the second substrate 200 to which the retarder coating layer is applied, a curing reaction such as a thermosetting agent is caused to remove a solvent contained in the retarder coating layer. it can.

The retarder coating layer is exposed to ultraviolet UV. The retarder coating layer is exposed to ultraviolet UV, causes a curing reaction of a photocurable monomer and a reactive mesogen, and has optical anisotropy. In the present embodiment, the case where the retarder coating layer is formed as a single layer has been described as an example, but the present invention is not limited thereto.

In contrast, the retarder coating layer can be formed in a multi-layer structure. When forming a retarder coating layer composed of a plurality of layers, each of the retarder coating layers can be exposed to ultraviolet rays UV having different wavelengths.

The retarder coating layer is heat treated. The first substrate 100 and the second substrate 200 in which the retarder coating layer is exposed to ultraviolet rays can be heat-treated using a deposition apparatus. For example, the generating apparatus may be an oven. At this time, the internal temperature of the generating apparatus can be set to a temperature ranging from 110 ° C to 130 ° C. Through the heat treatment, the retarder coating layer may have retardation in a direction perpendicular to a direction in which ultraviolet rays are irradiated. Further, through the heat treatment, the retarder coating layer is completely cured and the optical anisotropy is amplified.

Through the heat treatment, the retardation compensation films 400 </ b> A and 400 </ b> B disposed on the lower portion of the first substrate 100 and the upper portion of the second substrate 200 and including a fluorin resin may be formed.

The thickness of the retardation compensation films 400A and 400B may be 10 μm or less. The thickness of the retardation compensation films 400A and 400B may be 5 um or less.

The retardation compensation films 400A and 400B may further include a reactive mesogen having a fluorin functional group.

The reactive mesogen may include fluorin in one or more of the functional groups. The reactive mesogen containing the fluorin may undergo phase separation from the reactive mesogen in the process of being exposed to ultraviolet light, dried and heat-treated in the same manner as the fluorin resin.

Through such phase separation, the reactive mesogen containing a fluorine functional group has a lower surface energy than the reactive mesogen not containing a fluorine functional group, and moves to the outline of the retardation compensation films 400A and 400B. can do. The reactive mesogen including a fluorin functional group is disposed between the first substrate 100 and the reactive mesogen not including a fluorin functional group. In addition, the reactive mesogen including a fluorin functional group is disposed between the second substrate 200 and the reactive mesogen not including a fluorin functional group. Therefore, the hardness, antifouling property and scratch resistance of the retardation compensation films 400A and 400B can be improved.

FIG. 6 is a cross-sectional view of a liquid crystal display device according to an exemplary embodiment of the present invention.

Referring to FIG. 6, the liquid crystal display according to an exemplary embodiment of the present invention includes a first substrate 100, a second substrate 200, a liquid crystal layer 300, a black matrix BM, the second substrate 200, and the black matrix. A retardation compensation film 400C, a first polarizing plate 500, and a second polarizing plate 600 are disposed between the BMs.

The liquid crystal display device according to FIG. 6 is substantially the same as the liquid crystal display device according to FIG. 3 except for the configuration of the retardation compensation film 400C, and therefore, redundant description is omitted or simplified.

The liquid crystal display according to an exemplary embodiment of the present invention includes a retardation compensation film 400C disposed between the second substrate 200 and the black matrix BM.

The retardation compensation film 400C may include a fluorin resin.

A retarder composition including a fluorin resin is coated under the second substrate 200 to form a retarder coating layer.

The retarder composition includes a fluorin resin, a reactive mesogen, a photocurable monomer, a thermosetting agent, and a solvent.

The retardation compensation film 400C may include the fluorin resin in order to improve hardness and improve antifouling properties and scratch resistance.

The fluorin resin is included in the retarder composition and applied to the second substrate 200. There is a difference in surface energy between the fluorin resin and the reactive mesogen. Accordingly, phase separation between the fluorin resin and the reactive mesogen may occur in the process of UV exposure, drying, and heat treatment.

Generally, the surface energy of the reactive mesogen is 30 to 45 mN / m and has a large surface energy. On the other hand, the surface energy of the retardation compensation film 400C may be 25 mN / m or less. For example, the surface energy of the retardation compensation film 400C may be 10 to 25 mN / m.

The hardness of the retardation compensation film 400C may be 2H or more. For example, the hardness of the retardation compensation film 400C may be 2H to 5H.

Through such phase separation, the reactive mesogen containing a fluorine functional group has a lower surface energy than the reactive mesogen, and can move to the outline of the retardation compensation film 400C. That is, the reactive mesogen is disposed adjacent to the lower portion of the second substrate 200, and the reactive mesogen including the fluorin resin and the fluorin functional group is disposed under the reactive mesogen. Can do. Therefore, the hardness, antifouling property and scratch resistance of the retardation compensation film 400C can be improved.

In the method of applying the retarder composition, a method such as slit, ink jet, roll resin, or spin coating can be used. The retarder composition is in a solution state, and the viscosity may be in the range of 1 mPas to 50 mPas.

The retarder coating layer is heated. The second substrate 200 on which the retarder coating layer is applied can be dried using a heating device. For example, the heating device may be a hot plate. At this time, the heating device can set the retarder coating layer to a surface temperature in the range of 70 ° C. to 110 ° C. By heating the second substrate 200 on which the retarder coating layer is applied, a curing reaction such as a thermosetting agent can be caused, and the solvent contained in the retarder coating layer can be removed.

The retarder coating layer is exposed to ultraviolet UV. The retarder coating layer is exposed to ultraviolet UV, causes a curing reaction of a photocurable monomer and a reactive mesogen, and has optical anisotropy. In the present embodiment, the case where the retarder coating layer is formed as a single layer has been described as an example, but the present invention is not limited thereto.

In contrast, the retarder coating layer can be formed in a multi-layer structure. When forming a retarder coating layer composed of a plurality of layers, each of the retarder coating layers can be exposed to ultraviolet rays UV having different wavelengths.

The retarder coating layer is heat treated. The second substrate 200 having the retarder coating layer exposed to ultraviolet rays can be heat-treated using a deposition apparatus. For example, the generating apparatus may be an oven. At this time, the internal temperature of the generating apparatus can be set to a temperature ranging from 110 ° C to 130 ° C. Through the heat treatment, retardation can be generated in the retarder coating layer in a direction perpendicular to a direction irradiated with ultraviolet rays. Further, through the heat treatment, the retarder coating layer is completely cured and the optical anisotropy is amplified.

Through the heat treatment, the retardation compensation film 400C including a fluorin resin disposed under the second substrate 200 may be formed.

The thickness of the retardation compensation film 400C may be 10 μm or less. The thickness of the retardation compensation film 400C may be 5 um or less.

The retardation compensation film 400C may further include a reactive mesogen having a fluorin functional group.

The reactive mesogen may include fluorin in one or more of the functional groups. The reactive mesogen containing the fluorin can undergo phase separation in the process of being exposed to ultraviolet light, dried and heat-treated in the same manner as the fluorin resin.

FIG. 7 is a cross-sectional view of a liquid crystal display device according to an exemplary embodiment of the present invention.

Referring to FIG. 7, the liquid crystal display according to an exemplary embodiment of the present invention includes a first substrate 100, a second substrate 200, a liquid crystal layer 300, a retardation compensation film 400D disposed on a black matrix BM, A first polarizing plate 500 and a second polarizing plate 600 are included.

Since the liquid crystal display device according to FIG. 7 is substantially the same as the liquid crystal display device according to FIG. 3 except for the configuration of the retardation compensation film 400D, the redundant description is omitted or simplified.

A liquid crystal display device according to an exemplary embodiment of the present invention includes a retardation compensation film 400D disposed on the black matrix BM. The black matrix BM is disposed on the second substrate 200, and the retardation compensation film 400D is disposed on the black matrix BM disposed on the second substrate 200.

The retardation compensation film 400D may include a fluorin resin.

A retarder composition including a fluorin resin is coated on the black matrix BM to form a retarder coating layer.

The retarder composition includes a fluorin resin, a reactive mesogen, a photocurable monomer, a thermosetting agent, and a solvent.

The retardation compensation film 400D may include the fluorin resin in order to improve hardness and improve antifouling properties and scratch resistance.

The fluorin resin is included in the retarder composition and applied to the second substrate 200. There is a difference in surface energy between the fluorin resin and the reactive mesogen. Accordingly, phase separation between the fluorin resin and the reactive mesogen may occur in the process of UV exposure, drying, and heat treatment.

Generally, the surface energy of the reactive mesogen is 30 to 45 mN / m and has a large surface energy. On the other hand, the surface energy of the retardation compensation film 400D may be 25 mN / m or less. For example, the surface energy of the retardation compensation film 400D may be 10 to 25 mN / m.

The hardness of the retardation compensation film 400D may be 2H or more. For example, the hardness of the retardation compensation film 400D may be 2H to 5H.

In the method of applying the retarder composition, a method such as slit, ink jet, roll resin, or spin coating can be used. The retarder composition is in a solution state, and the viscosity may be in the range of 1 mPas to 50 mPas.

The retarder coating layer is heated. The second substrate 200 on which the retarder coating layer is applied can be dried using a heating device. For example, the heating device may be a hot plate. At this time, the heating device can set the retarder coating layer to a surface temperature in the range of 70 ° C. to 110 ° C. The second substrate 200 on which the retarder coating layer is applied is heated to cause a curing reaction such as a thermosetting agent and a reactive mesogen, thereby removing the solvent contained in the retarder coating layer. it can.

The retarder coating layer is exposed to ultraviolet UV. The retarder coating layer is exposed to ultraviolet UV, causes a curing reaction of a photocurable monomer and a reactive mesogen, and has optical anisotropy. In the present embodiment, the case where the retarder coating layer is formed as a single layer has been described as an example, but the present invention is not limited thereto.

In contrast to this, the retarder coating layer may be formed in a structure composed of a plurality of layers. When forming the retarder coating layer which consists of several layers, each retarder coating layer can be exposed to ultraviolet-ray UV of a different wavelength, respectively.

The retarder coating layer is heat treated. The second substrate 200 having the retarder coating layer exposed to ultraviolet rays can be heat-treated using a deposition apparatus. For example, the generating apparatus may be an oven. At this time, the internal temperature of the generating apparatus can be set to a temperature ranging from 110 ° C to 130 ° C. Through the heat treatment, a retardation can be developed in the direction perpendicular to the direction irradiated with ultraviolet rays in the retarder coating layer. Further, through the heat treatment, the retarder coating layer is completely cured and the optical anisotropy is amplified.

Through the heat treatment, the retardation compensation film 400D that is disposed on the black matrix BM and includes a fluorin resin may be formed.
The thickness of the retardation compensation film 400D may be 10 μm or less. The thickness of the retardation compensation film 400D may be 5 um or less.

The retardation compensation film 400D may further include a reactive mesogen having a fluorin functional group.

The reactive mesogen may include fluorin in one or more of the functional groups. The reactive mesogen containing the fluorin can undergo phase separation from the reactive mesogen in the process of being exposed to ultraviolet light, dried and heat-treated in the same manner as the fluorin resin.

FIG. 8 is a cross-sectional view of a liquid crystal display device according to an exemplary embodiment of the present invention.

Referring to FIG. 8, the liquid crystal display according to an exemplary embodiment of the present invention includes a phase difference disposed on a first substrate 100, a second substrate 200, a liquid crystal layer 300, and a second overcoating layer 210. A compensation film 400E, a first polarizing plate 500, and a second polarizing plate 600 are included.

The liquid crystal display device according to FIG. 8 is substantially the same as the liquid crystal display device according to FIG. 3 except for the configuration of the retardation compensation film 400E, and therefore, redundant description is omitted or simplified.

The liquid crystal display according to an exemplary embodiment of the present invention includes a retardation compensation film 400E disposed on the second overcoating layer 210. The second overcoating layer 210 is disposed on the second substrate 200, and the retardation compensation film 400E is disposed on the second overcoating layer 210 disposed on the second substrate 200. .

The retardation compensation film 400E may include a fluorin resin.

A retarder composition including a fluorin resin is coated on the second overcoating layer 210 to form a retarder coating layer.

The retarder composition includes a fluorin resin, a reactive mesogen, a photocurable monomer, a thermosetting agent, and a solvent.

The retardation compensation film 400E may include the fluorin resin in order to improve hardness and improve antifouling properties and scratch resistance.

The fluorin resin is included in the retarder composition and applied to the second substrate 200. There is a difference in surface energy between the fluorin resin and the reactive mesogen. Accordingly, phase separation between the fluorin resin and the reactive mesogen may occur in the process of UV exposure, drying, and heat treatment.

Generally, the surface energy of the reactive mesogen is 30 to 45 mN / m and has a large surface energy. On the other hand, the surface energy of the retardation compensation film 400E may be 25 mN / m or less. For example, the surface energy of the retardation compensation film 400E may be 10 to 25 mN / m.

The hardness of the retardation compensation film 400E may be 2H or more. For example, the hardness of the retardation compensation film 400E may be 2H to 5H.

In the method of applying the retarder composition, a method such as slit, ink jet, roll resin, or spin coating can be used. The retarder composition is in a solution state, and the viscosity may be in the range of 1 mPas to 50 mPas.

The retarder coating layer is heated. The second substrate 200 on which the retarder coating layer is applied can be dried using a heating device. For example, the heating device may be a hot plate. At this time, the heating device can set the retarder coating layer to a surface temperature in the range of 70 ° C. to 110 ° C. The second substrate 200 on which the retarder coating layer is applied is heated to cause a curing reaction such as a thermosetting agent and a reactive mesogen, thereby removing the solvent contained in the retarder coating layer. it can.

The retarder coating layer is exposed to ultraviolet UV. The retarder coating layer is exposed to ultraviolet UV, causes a curing reaction of a photocurable monomer and a reactive mesogen, and has optical anisotropy. In the present embodiment, the case where the retarder coating layer is formed as a single layer has been described as an example, but the present invention is not limited thereto.

In contrast, the retarder coating layer can be formed in a multi-layer structure. When forming the retarder coating layer which consists of several layers, each retarder coating layer can be exposed to ultraviolet-ray UV of a different wavelength, respectively.

The retarder coating layer is heat treated. The second substrate 200 having the retarder coating layer exposed to ultraviolet rays can be heat-treated using a deposition apparatus. For example, the generating apparatus may be an oven. At this time, the internal temperature of the generating apparatus can be set to a temperature ranging from 110 ° C to 130 ° C. Through the heat treatment, retardation can be generated in the retarder coating layer in a direction perpendicular to the direction irradiated with ultraviolet rays. Further, through the heat treatment, the retarder coating layer is completely cured and the optical anisotropy is amplified.

Through the heat treatment, the retardation compensation film 400E including the fluorin resin disposed on the second overcoating layer 210 may be formed.

The thickness of the retardation compensation film 400E may be 10 μm or less. Preferably, the thickness of the retardation compensation film 400E may be 5 um or less.

The retardation compensation film 400E may further include a reactive mesogen having a fluorin functional group.

The reactive mesogen may include fluorin in one or more of the functional groups. The reactive mesogen containing the fluorin may undergo phase separation from the reactive mesogen in the process of being exposed to ultraviolet light, dried and heat-treated in the same manner as the fluorin resin.

FIG. 9 is a cross-sectional view of a liquid crystal display device according to an exemplary embodiment of the present invention.

Referring to FIG. 9, the liquid crystal display device silver first substrate 100, the second substrate 200, the liquid crystal layer 300, the retardation compensation film 400F disposed on the common electrode CE according to an exemplary embodiment of the present invention, A first polarizing plate 500 and a second polarizing plate 600 are included.

The liquid crystal display device according to FIG. 9 is substantially the same as the liquid crystal display device according to FIG. 3 except for the configuration of the retardation compensation film 400F.

The liquid crystal display device according to an exemplary embodiment of the present invention includes a retardation compensation film 400F disposed on the common electrode CE. The common electrode CE is disposed on the second substrate 200, and the retardation compensation film 400F is disposed on the common electrode CE disposed on the second substrate 200.

The retardation compensation film 400F may include a fluorin resin.

A retarder composition including a fluorin resin is coated on the common electrode CE to form a retarder coating layer.

The retarder composition includes a fluorin resin, a reactive mesogen, a photocurable monomer, a thermosetting agent, and a solvent.

The retardation compensation film 400F may include the fluorin resin in order to improve hardness and improve antifouling properties and scratch resistance.

The fluorin resin is applied to the second substrate 200 by being included in the retarder composition. There is a difference in surface energy between the fluorin resin and the reactive mesogen. Accordingly, phase separation between the fluorin resin and the reactive mesogen may occur in the process of UV exposure, drying, and heat treatment.

Generally, the surface energy of the reactive mesogen is 30 to 45 mN / m and has a large surface energy. On the other hand, the surface energy of the retardation compensation film 400F may be 25 mN / m or less. For example, the surface energy of the retardation compensation film 400F may be 10 to 25 mN / m.

The hardness of the retardation compensation film 400F may be 2H or more. For example, the hardness of the retardation compensation film 400F may be 2H to 5H.

In the method of applying the retarder composition, a method such as slit, ink jet, roll resin, or spin coating can be used. The retarder composition is in a solution state, and the viscosity may be in the range of 1 mPas to 50 mPas.

The retarder coating layer is heated. The second substrate 200 on which the retarder coating layer is applied can be dried using a heating device. For example, the heating device may be a hot plate. At this time, the heating device can set the retarder coating layer to a surface temperature in the range of 70 ° C. to 110 ° C. The second substrate 200 on which the retarder coating layer is applied is heated to cause a curing reaction such as a thermosetting agent and a reactive mesogen, thereby removing the solvent contained in the retarder coating layer. it can.

The retarder coating layer is exposed to ultraviolet UV. The retarder coating layer is exposed to ultraviolet UV, causes a curing reaction of a photocurable monomer and a reactive mesogen, and has optical anisotropy. In the present embodiment, the case where the retarder coating layer is formed of one layer has been described as an example, but the present invention is not limited thereto.

In contrast, the retarder coating layer can be formed in a multi-layer structure. When forming the retarder coating layer which consists of several layers, each retarder coating layer can be exposed to ultraviolet-ray UV of a different wavelength, respectively.

The retarder coating layer is heat treated. The second substrate 200 having the retarder coating layer exposed to ultraviolet rays can be heat-treated using a deposition apparatus. For example, the generating apparatus may be an oven. At this time, the internal temperature of the generating apparatus can be set to a temperature ranging from 110 ° C to 130 ° C. Through the heat treatment, retardation can be generated in the retarder coating layer in a direction perpendicular to a direction irradiated with ultraviolet rays. Further, through the heat treatment, the retarder coating layer is completely cured and the optical anisotropy is amplified.

Through the heat treatment, the retardation compensation film 400 </ b> F disposed on the common electrode CE and including a fluorin resin may be formed.

The thickness of the retardation compensation film 400F may be 10 μm or less. The thickness of the retardation compensation film 400F may be 5 um or less.

The retardation compensation film 400F may further include a reactive mesogen having a fluorin functional group.

The reactive mesogen may include fluorin in one or more of the functional groups. The reactive mesogen containing the fluorin may undergo phase separation from the reactive mesogen in the process of being exposed to ultraviolet light, dried and heat-treated in the same manner as the fluorin resin.

Since the retardation compensation film is directly formed on the substrate, the manufacturing cost of the polarizing plate can be reduced, the thickness of the compensation film can be reduced, and the substrate etching process for reducing the thickness of the cell can be omitted. Therefore, manufacturing cost can be reduced and productivity can be improved. The retardation compensation film can be cured before liquid crystal injection to prevent the liquid crystal from being damaged, and the display quality of the liquid crystal display device can be improved.

Although the above description has been made with reference to the embodiments, ordinary engineers skilled in the art can make various modifications of the present invention within the scope and spirit of the present invention described in the following claims. It should be understood that modifications and changes are possible.

The liquid crystal display device and the method for manufacturing the liquid crystal display device according to the embodiments of the present invention can be applied to various types of liquid crystal display devices, organic light emitting display devices, and the like.

100 first substrate 110 gate insulating layer 120 data insulating layer 130 first overcoating layer 200 second substrate 210 second overcoating layer 300 liquid crystal layer 400A, 400B, 400C, 400D, 400E, 400F retardation compensation film 500, 600 first 1 polarizing plate, 2nd polarizing plate PE pixel electrode CE common electrode BM black matrix CF color filter layer D1, D2 1st direction, 2nd direction

Claims (10)

A first substrate;
A second substrate facing the first substrate;
A liquid crystal layer disposed between the first substrate and the second substrate;
A liquid crystal display device comprising a retardation compensation film formed on one surface of the first substrate and containing a fluorin resin. 2. The liquid crystal display device according to claim 1, wherein the fluorin element ratio in the surface portion of the retardation compensation film is 20 atomic% to 30 atomic% with respect to the total element ratio. The fluorin resin may be polytetrafluoroethylene (PTFE), fluorinated ethylene propylene (FEP), perfluoroalkoxy (PFA), ethylene-tetrafluoroethylene (ethylene ET), or the like. , Polyvinylidene fluoride (PVDF), ethylene-chlorotrifluoroethylene (ECTFE), polychlorotrifluoroethylene (PCTFE) The liquid crystal display device according to claim 1, wherein at least one selected from a group consisting of these and combinations thereof is selected. The liquid crystal display device according to claim 1, wherein the retardation compensation film is disposed under the first substrate. The liquid crystal display device according to claim 1, wherein the retardation compensation film is disposed on an upper portion of the second substrate. The liquid crystal display device according to claim 1, wherein the retardation compensation film is disposed on a lower portion of the first substrate and an upper portion of the second substrate. The liquid crystal display device according to claim 1, wherein the retardation compensation film further includes a reactive mesogen having a fluorin functional group. The liquid crystal display device according to claim 1, wherein a thickness of the retardation compensation film is 10 μm or less. The liquid crystal display device according to claim 1, wherein the retardation compensation film has a hardness of 2H or more. The liquid crystal display device according to claim 1, wherein a surface energy of the retardation compensation film is 25 mN / m or less.

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